This is a full day on the Costa Brava cliff road, 118 km on a road bike with 1,650 m of climbing spread over many short rises rather than one big pass. The route follows the coast between coves, with the sea in view for much of the day, and stops for a seafood lunch that is a proper break rather than a quick refuel.
It is the longest single-day ride on the Ride Santader programme, and it is graded hard because of distance and accumulated climbing, not steepness. If you want one concentrated effort, the Santader big climb morning is a better fit. If you want a gentler day that still reaches the coast, look at the Santader greenway easy day.
Expect a steady, rolling rhythm: climb out of a cove, descend into the next, repeat. The pace suits riders who can sit comfortably in the saddle for several hours.